SNOCRUISE SLED 101

 

Snowmobile Mechanical

  • Basic Mechanical

    The light weight 2 stroke engine, a 3 cylinder "Triple" model pictured here. This image is of the front of the engine where this models exhaust exits. The water pump is visible on the lower left behind the "right front" motor mount. On the right of the photo is the crankshaft PTO output where the "primary" or "drive" clutch is normally installed. On the opposite end is the "recoil" or "pull start" housing.


    The crankshaft that goes around and around and similarly to a bicycle pedal crank, in which also the pedals are pumped up and down.

     
    So instead of pedals being pumped up and down like on a bicycle, combustion "pumps" the pistons up and down which in turn spins the crankshaft.


    This is the variable speed clutches, the smaller diameter "primary" or "drive" mounted on the engine crankshaft. And the larger diameter "secondary" or "driven" clutch. The fit, deflection and width of the drive belt is absolutely critical to proper snowmobile operation.

       
    Photo 1 is the die cast balanced and matched primary assembly. Photo 2 is the protruding 3 arm spider with roller against calibrated weight, restrained at idle by the drive spring. Photo 3 shows the drive clutch exposing the drive sheaves on which the belt is manipulated. Photo 4 is the driven clutch helix and driven spring. You can see where the bushings move on the shaft, when the clutches shift in unison and the sheaves open for higher speed.


    Where the "rubber meets the road" as the old saying goes. This is a "121 inch" model 15 inches wide with 1 inch treads adequate for a 90HP sled that can run on a groomed trail with out worry of over heating suspension and drive components.
    Also visible is the extruded aluminum heat exchangers mounted under the running boards. These heat exchangers permit the liquid cooled snowmobile engines to run at a low stable temperature contusive to making twice the staying power of comparably sized air cooled models.


    High quality skis and "Dually" carbides round out a good handing package. A skid plate adds integrity to the plastic belly pan and protects the chassis from some of the obstacles hidden in the snow.


    The plastic "sliders" or "hyfax" is red and visible thru the open windows created in the track for lubrication and cooling.

    Brakes...often overlooked but really one of the most important pieces of the snowmobile puzzle! Riding a snowmobile with one of the most responsive brake systems ever built means you get to wear our 3 Fingered Mitts.